CN200944603Y - CAN bus adapter of vehicle running recorder - Google Patents
CAN bus adapter of vehicle running recorder Download PDFInfo
- Publication number
- CN200944603Y CN200944603Y CN 200620107335 CN200620107335U CN200944603Y CN 200944603 Y CN200944603 Y CN 200944603Y CN 200620107335 CN200620107335 CN 200620107335 CN 200620107335 U CN200620107335 U CN 200620107335U CN 200944603 Y CN200944603 Y CN 200944603Y
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- bus
- microprocessor
- running recorder
- car running
- bus adapter
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Abstract
The utility model discloses a CAN bus adapter of vehicle running recorder, which belongs to the field of automobile electronics technology. The CAN bus adaptor is characterized in that two signal cables of a CAN bus interface 1 which to be used for connecting a vehicle CAN bus are provided with a CAN transceiver 2 and a CAN controller 3 in sequence, a data port of the CAN controller 3 is connected with a microprocessor 4 and the microprocessor 4 is provided with a signal transmission interface 5. The abovementioned CAN bus adaptor of a vehicle running recorder has a novel design and a reasonable structure, which can simulate various signal data collected from the vehicle CAN bus as a signal output of a common vehicle. The vehicle running recorder manufactured according to the national standard, via the adoption of the adaptor, can receive and use the transmission signals of a CAN bus, which makes the procedures for installing a vehicle running recorder on a vehicle with a CAN bus simple, and meanwhile the information is more complete and comprehensive.
Description
Technical field
The utility model belongs to technical field of automotive electronics, is specifically related to a kind of bus adapter of car running recorder CAN.
Background technology
Automobile travel recorder (being commonly called as automobile black box) can write down, preserve and export information such as Vehicle Speed, time, mileage and driver behaviors; Can on-the-spotly inquire about or print the last situation of driving, or, reproduce whole driving procedure by DAS; Can also in time remind the driver to slow down or to have a rest, its effect comprises the awareness of safety that has improved the driver, the generation of effectively preventing accident, for law-executor's accident treatment provide according to, make things convenient for the internal control of transport enterprise etc.
Along with the continuous development of automotive electronic technology, the number of various electronic control units constantly increases on the automobile, and connecting lead significantly increases, thereby the communication reliability has become the problem that presses for solution with reduction lead cost between the raising control unit.The CAN bus is a kind of many main station controllers of serial local area network bus, it is the string communication network of distributed control of a kind of effective support or real-time control, because its traffic rate height, good reliability and lower-price characteristic are particularly suitable in the traffic delivery means electrical system it.Germany BOSCH company has developed the CAN bus protocol, and makes it become international standard (ISO11898).Intel Company takes the lead in developing CAN bus protocol controller chip, up to the present, had tame CAN bus control unit chip production merchant more than 20 in the world, the microprocessor chip of more than 110 kind of CAN bus protocol controller chip and integrated CAN bus protocol controller.In North America and West Europe, the CAN bus protocol has become the STD bus of Computer Controlled System for Vehicle and built-in industrial control area net, and to have with CAN be the J1939 agreement that underlying protocol aims at the design of high capacity waggon and heavy industry motor vehicles and machines.The automobile CAN-bus of China is started late, but along with the continuous progress of Hyundai Motor electronics, its research and to use be a kind of inevitable trend.
It is that vehicle with no CAN bus is as reference basis that the automobile travel recorder that uses is granted in present domestic affirmation, the speed of automobile is passed to recorder by pulse signal, for example, tire turns around and sends 8 pulses, changeing 624 circles is exactly 1 kilometer, and recorder is judged current vehicle speed by the number of statistics pulse and calculated mileage.Driver's operation information is also passed to recorder by high-low level, single line in succession recorder and brake switch are for example arranged, when stepping on brake, the driver becomes low level, get back to high level during releasing of brake, also have single line in succession recorder and Der StandlichtScheinwerfer und Parkleuchtenschalter, being low level when headlight illuminates, is high level when extinguishing, so recorder connects automobile a lot of root lines is arranged.And the automobile travel recorder that can connect the CAN bus does not have corresponding GB as foundation, does not obtain being duly admitted of country as yet.So the CAN bus resource that is disposed on the automobile can't formally be applied to automobile travel recorder under prior art.
The utility model content
For overcoming problems of the prior art, the utility model provides a kind of bus adapter of car running recorder CAN technical scheme, makes the automobile travel recorder that meets GB to receive by this adapter and uses the automobile CAN-bus transmission signals.
Described bus adapter of car running recorder CAN, two holding wires that it is characterized in that being used to connecting the CAN bus interface 1 of automobile CAN-bus connect successively CAN transceiver 2, CAN controller 3 are set, the FPDP of CAN controller 3 is connected with microprocessor 4, and microprocessor 4 connects signalization coffret 5.
Described bus adapter of car running recorder CAN is characterized in that on CanH, the CanL of CAN bus interface 1 polarity detection circuit 9 being set, and the output of polarity detection circuit 9 is connected with microprocessor 4.
Described bus adapter of car running recorder CAN is characterized in that microprocessor 4 connections are provided with nonvolatile storage 7.
Described bus adapter of car running recorder CAN is characterized in that microprocessor 4 is provided with data communication interface 8.
Described bus adapter of car running recorder CAN is characterized in that connecting respectively on two holding wire CanH, the CanL of described CAN transceiver 2 interface protective circuit that is made of protection diode D2/D3, filter capacitor C29/C30 and protective resistance R23/R24 is set.
Described bus adapter of car running recorder CAN is characterized in that two holding wire CANTXD, CANRXD of CAN transceiver 2 directly are connected with the microprocessor 4 that contains the CAN controller.
Described bus adapter of car running recorder CAN, it is characterized in that CAN bus interface 1 two holding wires connect polarity switching circuit 10 be set, the control incoming line of polarity switching circuit 10 is connected with microprocessor 4.
Described bus adapter of car running recorder CAN is characterized in that described polarity detection circuit 9 is the voltage difference polarity detection circuit, is connected and composed by light idol U3, U4 and current-limiting resistance.
Described bus adapter of car running recorder CAN is characterized in that microprocessor (4) connection is provided with demonstration/warning device 6.
Described bus adapter of car running recorder CAN is characterized in that described polarity switching circuit 10 is connected and composed by dpdt relay K1, triode Q2 and resistance R 2.
Above-mentioned bus adapter of car running recorder CAN, novel, rational in infrastructure, the various signal data simulations of gathering on the automobile CAN-bus can be the signal output of general-utility car, by this adapter, the automobile travel recorder of producing according to national standard just can receive, use the transmission signals of CAN bus, simplified the installation procedure that automobile travel recorder uses on band CAN bus automobile, information is also more abundant, comprehensive.
Description of drawings
Figure 1 shows that the structured flowchart of bus adapter of car running recorder CAN;
Figure 2 shows that the wiring schematic diagram of CAN bus input interface;
Figure 3 shows that the interface protective circuit structural representation;
Figure 4 shows that the polarity detection circuit structural representation;
Figure 5 shows that the polarity switching circuit structural representation;
Figure 6 shows that use mounting structure block diagram of the present utility model;
Embodiment
Now, describe embodiment of the present utility model in detail in conjunction with Figure of description:
Can1 and Can2 are 2 holding wires of CAN bus in the accompanying drawing, and wherein the relative voltage of Can1 is higher than Can2; 2 holding wires of correspondence and Can1 and Can2 in CanH and the CanL adapter, the relative voltage of CanH is higher than CanL accordingly.Bus adapter of car running recorder CAN as shown in Figure 1; the CAN bus interface 1 general four-core socket that adopts that connects automobile CAN-bus; two signal CanH of CAN bus interface 1; the CanL line connects successively CAN transceiver 2 is set; CAN controller 3; CAN transceiver 2 is the bottom transceiving chip of CAN bus; model commonly used at present has PCA82C250; PCA82C251; TJA1040; TJA1041; TJA1050; TJA1054; SN65HVD1050 etc.; interface protective circuit is set between CAN transceiver 2 and the CAN bus interface 1 damages internal circuit to prevent extraneous unexpected high pressure; CAN controller 3 is individual processing chips of handling the CAN agreement; as SJA1000; the FPDP connection of CAN controller 3 is provided with microprocessor 4; the microprocessor 4 that is suitable for has 51 series; ARM series; AVR series; TM430 series etc.; if comprised the CAN controller in the microprocessor 4; as P87C591; TMS320LF2407A; LPC2119; just do not need independent CAN controller 3; microprocessor 4 is set directly at two holding wire CANTXD of CAN transceiver 2; on the CANRXD; connect signalization coffret 5 on the microprocessor 4; be used for and being connected of automobile travel recorder, export corresponding analog signal.Data communication interface 8 is set on the microprocessor 4, can be RS232, RS485, USB mouth or parallel port, is used for being connected with other smart machines, perhaps is used to be provided with parameter or debugging.Microprocessor 4 connects nonvolatile storage 7 is set, and as EEPROM series, FLASH series etc., parameter is kept in the nonvolatile storage, under the situation of multiple CAN bus environment or multiple user's request, with can be general mutually by parameter is set.Last polarity detection circuit 9, the polarity switching circuit 10 that is provided with by microprocessor 4 controls that connect of two holding wire CanH, CanL of CAN bus interface 1, in order to identification CanH, CanL, whether correct with the mode of connection of Can1, Can2, and automatic switchover CanH, CanL when incorrect polarity occurring, with the corresponding annexation of Can1, Can2, adjust polarity, and connect at microprocessor 4 and demonstrations/warning device 6 to be set with prompting wiring error, demonstration/warning device 6 can adopt indicator light, display screen, buzzer or loudspeaker, is used to represent current state.In the above-mentioned execution mode; the circuit connecting relation that reaches demonstration/warning device 6 and microprocessor 4 between bus interface 1, CAN transceiver 2, CAN controller 3, microprocessor 4, the signal transmission interface 5 is general known technology; related software related in the scheme all repeats no more at this not within protection scope of the present invention.
As shown in Figure 2, CAN bus interface 1 winding diagram adopts four-core socket J1, and two cores wherein connect CAN bus Can1, Can2, a core ground connection.
Be illustrated in figure 3 as a kind of execution mode of interface protective circuit; when CAN transceiver 2 adopted PCA82C250, the last connection of its input signal cable CanH, CanL was provided with the interface protective circuit that is connected and composed by protection diode D2/D3, filter capacitor C29/C30 and protective resistance R23/R24.
Be illustrated in figure 4 as the circuit structure of 9 one kinds of execution modes of polarity detection circuit, connect and compose by light idol U3, U4 and current-limiting resistance R1 and to utilize voltage difference to carry out polarity to detect, resistance R 1 is that current-limiting resistance U3 and U4 are the light idols, when wiring correct, CanH is higher than CanL, and then Polar2 is that high level, Polar1 are low levels; Work as wiring error, when CanL was higher than CanH, then Polar1 was that high level, Polar2 are low levels, and microprocessor receives the electric potential signal of Polar1, Polar2, judges according to this whether polarity is correct, output corresponding warning signal during incorrect polarity.
Be illustrated in figure 5 as the circuit structure of 10 1 kinds of execution modes of polarity switching circuit; K1 is the relay of dpdt double-pole double-throw (DPDT); D5 is the protection diode of relay; microprocessor control signal HK receives the base stage of triode Q2 by resistance R 2; come the state of two contacts of control relay by the collector electrode of triode; conversion CanH, CanL, with the corresponding annexation of Can1, Can2, reach the purpose of reverse.
Be illustrated in figure 6 as use mounting structure of the present utility model, the plug that connects the CAN bus inserts CAN bus interface 1, connect CAN bus and this adapter, signal transmission interface 5 is connected with automobile travel recorder, transmit corresponding analog signal, the signal that other signals general reference among the figure is not enumerated separately, as left lamp, right lamp, car door, move backward, blow a trumpet, air pressure, oil pressure, tire pressure etc.
Claims (10)
1. bus adapter of car running recorder CAN, two holding wires that it is characterized in that being used to connecting the CAN bus interface (1) of automobile CAN-bus connect successively CAN transceiver (2), CAN controller (3) are set, the FPDP of CAN controller (3) is connected with microprocessor (4), and microprocessor (4) connects signalization coffret (5).
2. bus adapter of car running recorder CAN as claimed in claim 1, it is characterized in that on 2 holding wire CanH, the CanL of CAN bus interface (1) polarity detection circuit (9) being set, the output of polarity detection circuit (9) is connected with microprocessor (4).
3. bus adapter of car running recorder CAN as claimed in claim 1 is characterized in that microprocessor (4) connection is provided with nonvolatile storage (7).
4. bus adapter of car running recorder CAN as claimed in claim 1 is characterized in that microprocessor (4) is provided with data communication interface (8).
5. bus adapter of car running recorder CAN as claimed in claim 1 is characterized in that connecting respectively on two holding wire CanH, the CanL of described CAN transceiver (2) interface protective circuit that is made of protection diode D2/D3, filter capacitor C29/C30 and protective resistance R23/R24 is set.
6. bus adapter of car running recorder CAN as claimed in claim 1 is characterized in that two holding wire CANTXD, CANRXD of CAN transceiver (2) directly are connected with the microprocessor that contains the CAN controller (4).
7. bus adapter of car running recorder CAN as claimed in claim 2, it is characterized in that CAN bus interface (1) two holding wires connect polarity switching circuit (10) be set, the control incoming line of polarity switching circuit (10) is connected with microprocessor (4).
8. bus adapter of car running recorder CAN as claimed in claim 2 is characterized in that described polarity detection circuit (9) is the voltage difference polarity detection circuit, is connected and composed by light idol U3, U4 and current-limiting resistance.
9. bus adapter of car running recorder CAN as claimed in claim 2 is characterized in that microprocessor (4) connection is provided with demonstration/warning device (6).
10. bus adapter of car running recorder CAN as claimed in claim 6 is characterized in that described polarity switching circuit (10) is connected and composed by dpdt relay K1, triode Q2 and resistance R 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107335 CN200944603Y (en) | 2006-09-01 | 2006-09-01 | CAN bus adapter of vehicle running recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107335 CN200944603Y (en) | 2006-09-01 | 2006-09-01 | CAN bus adapter of vehicle running recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200944603Y true CN200944603Y (en) | 2007-09-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620107335 Expired - Fee Related CN200944603Y (en) | 2006-09-01 | 2006-09-01 | CAN bus adapter of vehicle running recorder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200944603Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100562003C (en) * | 2006-09-01 | 2009-11-18 | 杭州中导科技开发有限公司 | Bus adapter of car running recorder CAN |
| CN101515878B (en) * | 2009-03-30 | 2011-06-15 | 哈尔滨工业大学 | Hot plug adaptive device applied on CAN bus |
| CN105763406A (en) * | 2016-04-01 | 2016-07-13 | 北京兆易创新科技股份有限公司 | CAN bus transceiver |
| CN106494343A (en) * | 2016-10-18 | 2017-03-15 | 数源科技股份有限公司 | A kind of broken glass device control system of intelligence |
-
2006
- 2006-09-01 CN CN 200620107335 patent/CN200944603Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100562003C (en) * | 2006-09-01 | 2009-11-18 | 杭州中导科技开发有限公司 | Bus adapter of car running recorder CAN |
| CN101515878B (en) * | 2009-03-30 | 2011-06-15 | 哈尔滨工业大学 | Hot plug adaptive device applied on CAN bus |
| CN105763406A (en) * | 2016-04-01 | 2016-07-13 | 北京兆易创新科技股份有限公司 | CAN bus transceiver |
| CN105763406B (en) * | 2016-04-01 | 2019-09-17 | 北京兆易创新科技股份有限公司 | A kind of CAN bus transceiver |
| CN106494343A (en) * | 2016-10-18 | 2017-03-15 | 数源科技股份有限公司 | A kind of broken glass device control system of intelligence |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070905 Termination date: 20140901 |
|
| EXPY | Termination of patent right or utility model |